Text field changes on User Objects in AD are not being audited.
In addition to the custom attributes, normal text based attributes, such as "Description", "Office", or "Telephone" are also affected.
Uninstall the Microsoft Optional Patch KB3000850,KB003103709 or KB3184471from any/all Windows 2012 R2 Domain Controllers, and then reboot the server. The contents of the patch should be reviewed prior to uninstalling. Quest is not responsible for any negative impacts of removing Microsoft patches. Any questions or concerns about removing Microsoft patches should be directed to Microsoft's support team.
Upgrade to Change Auditor 18.104.22.1687+ will resolve the issue regardless if the patch is installed or not.